Jay Giannone is an American actor, director, writer, and producer known for his work in both film and television. He is often recognized for his supporting roles in major films, particularly those in the crime and thriller genres. Some of his notable acting roles include appearances in films like The Departed (2006), directed by Martin Scorsese, where he played a small but memorable part, and Patriots Day (2016), a film about the Boston Marathon bombing directed by Peter Berg.

In addition to his acting career, Giannone has worked behind the scenes as a director and writer, and he often draws on his personal experiences growing up in South Boston, a neighborhood known for its working-class roots and proximity to some of the real-life events and figures portrayed in his projects. Giannone is known for his gritty, authentic portrayal of urban characters, and he has worked closely with other actors and directors in the Boston film community.